Tweeter for Civic Lx '07?

Hi i bought a new honda civic Lx '07. This model doesn't come with Tweeters but civic Ex'07 does. How can i install tweeter for LX? Where can i wiring harness? Honda accessorries doesn't hv this? some help pl.

the wiring should already be there .... you just need a set of tweeters to install there.